What is needed is a high Tesla (not the car, not the genius) magnetic environment sufficient to push from above on the water molecules within the body. Figure out how to do that on the cheap, with wide coverage to simulate gravity’s physical loading effect to give a 1 G workout.
I have had an MRI and I could definitely feel it when they switched it on. Maybe that’s a solution. This is where basic research come into play. I am amazed by how much conditioning you must get from just having gravity tugging at every molecule in your body 24x7.